Gendorf



(No Model.)

W. C. HILLGENDORF.

SEGURER. V 10.534,1716. l Paten-mnh. 26, '1895.

' Zyl e u Vy/M i UNITED STATES PATENT OFFICE.

WILHELM CARL HILLGENDORF, OF HAMBURG, GERMANY, AASSIGNOR TO BEENCK &RIEDELL AND JOHANN MARTIN CARL MAX HARTWIG, OF

SAME PLACE.

Doon-SECURER.

SPECIFICATION forming part of Letters Patent No. 534,716, dated February26, 1895. Appncttion tutti November 5, 1894. senti No. 527,891. (Noman.) Patented in Germany April 26, 18931N 74,853-

.Toall whom t may concern:

Be it known that 4I, WILHELM CARL HILL- GENDORF, a subject of the GermanEmperor, and a resident of Hamburg, in the German Empire, have inventedcertain new and useful Improvements in Automatic Door-Securers, (forwhich I have obtained a Vpatent in Germany, No. 74,853, dated April 26,1393,) of which the following is a specification.

My invention has relation to that class of door checks whereby a doormay be partially opened but not sufficiently to admit of the passage ofa person.

.'Ihe invention has for its object the provlslon of means whereby theconstruction of this class of devices is not only simplified, butwhereby the tampering with the door check from without is more eectuallyprevented and the disengaging of the locking devices of the check fromwithin facilitated, as

, will now befully described, reference being hadto the accompanyingdrawings, in which- Figure 1 is a face view of the door check, the doorbeing closed, and Figs. 2 and 3 are horizontal sections through parts ofa door frame or jamb, and a door through the door check, Fig. 2illustrating the operative devices of the check in the position theyoccupy when the door is closed, and in dotted lines the position theyoccupy when said door is opened to the full extent permitted bythecheck, while Fig. 3 shows said operative devlees in the position theyoccupy on opening the door when said devices are not intended to operateas a check.

In the above iigures of the drawings ct indicates the door, to which issecured by means of screws the check latch plate e, from the forward endof which projects the check latch e terminating at its outer end in across or T-head, said check latch, as shown in Figs. 2 and 3 curvingupwardly and forwardly from its plate so as to leave a certain spacebetween its head and the door et, or the door frame or jamb b. To thelatter is secured the locking device, which consists of a haspconstructed in the form of a bell-crank lever, fulcrumed at d in earsformed on a bracket c, secured to the door frame by means of screws. The

short arm d2 of the hasp terminates preferably in a cross head d4 thatserves as an abutment or bearing for the T-head of the check latch e,when the door is closed, as shown in Figs. 1 and 2. The long arm d3 ofthe bell cranklever is slotted longitudinally, as shown at d6, the innerend of the slot being suitably enlarged to admit of thepassagetherethrough of the T-head of the check latch, as shown at d7, and saidlonger slotted arm of the lever constitutes the rcheck hasp. From theinner end of the narrower portion of the longitudinal slot (Z7 of thehasp d3 project downwardly curved tongues d5 one on each side of saidslot, the outer ends of said tongues lying on opposite sides of thecheck latch immediately behind its T-head so that on opening the door,the latch will ride over the tongues, and is thereby guided into theenlarged portion d7 of the slot d and thence into the more contractedportion, so that said door can be opened until the T-head of the latchreaches the outer end of the hasp slot, as. shown in dotted lines inFig. 2.

In practice I prefer to employ a stop f proximate to the lever fulcrumfor the purpose of limiting fthe movement of said lever toward the doorframe, as shown in Fig. 2.

It is obvious that by the means described it is impossible to disengagethe check latch from its hasp or keeper from'without the door when thelatter is partially open without applying destructive force, the partsresuming their normal position when the door is shut again. If it isdesired to admit passage through the door, the person within the roomsimply swings the check hasp toward the door frame, having previouslymanipulated the door latch so that the door will open under` the actionof the short arm d2 of the check latch, as shown in Fig. 3. l

If it is desired to maintain the check out of operation the pin f iswithdrawn and the hasp swung back into the position shown in dottedlines in Fig. 3, when the pin is again inserted in its bearings in thebracket c and between the long and short arms of the hasp. It is obvioustherefore, that the operation of the check is controlled by themovements of the check latch, While the free movements of the door aredependent upon the movements of the check hasp.

Having thus described my invention, what I claim as neW therein, anddesire to secure by Letters Patent, is

l. In a door check, a bell crank lever to be fulcrumed to a door frameand having arms of unequal length, in combination With a check latch tobe rigidly secured to a door, said latch adapted when moved in onedirection to interlock with and slide along the longer arm of and turnthe lever in said direction, and When moved in a reverse direction toslide along and release said longer arm and act upon the shorter arm ofsuch lever myinvention I have signed my name, in presence of twoWitnesses, this 22d day of October, 1894.

WILHELM CARL IHLLGENDORF. Witnesses:

DIEDRIGH PETERSEN, HARRY F. W. GRETHS.

